Often, you??™ll need to use a foreground image for situations in which a 3D object needs to
go behind a 2D image. For example, suppose that a 3D car driving down the street needs
to pull up behind other cars that are in the footage. Using a combination of foreground
images (the cars) and a background image (the other parts of the footage), you can literally
put a 3D element ???into??? your still or moving imagery.
The foreground image behaves in most ways like the background image. The main difference
is that whereas the background image appears behind the 3D objects in the scene,
the foreground image is applied on top of the 3D objects.
Exercise 16.2 Applying Front Projections
You??™ve seen how easy it is to place a 3D object in front of a photograph. The look is convincing,
and you can go further with moving images. But what if you need to make the
Vase image blend more with the photograph? What if it needs to peek out from behind
the other parts of the image? This exercise shows you how to do just that.
1. Continue in Layout from the previous exercise.
2. In the Compositing tab of the Effects panel, make sure the Foyer image is still set
as the background image.
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